Safety-brake for street-cars.



0. E. GIE RDING. SAFETY BRAKE FOR STREET CARS.

. I APPLICATION FILED APR. 16, 1910. 983,041 Patented Jan. 31, 1911.

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APPLICATION FILED APE.16, 1910.

Patented 59111.31, 1.911.

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I G. E, GIERDING. SAFETY BRAKE FOR STREET CARS.

APPLICATION FILED APR. 16, 1910;

Patented Jan. 31, 1911.

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G. E, GIERDING.

ETY BRAKE FOR STREET CARS. APPLIGATI'ON FILED APR. 16, 1910.

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Patented Jan.31,1911.

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CHARLES E. (sl-IERDING, 0F BELLEVILLE, NEW JERSEY, ASSIGNOR TO STERLING- MEAKER COMPANY, OF NEWARK, NEW JERSEY, A CORPORATIGN 033 NEW JERSEY.

SAFETY-BRAKE FOR STREET CABS.

Specification of Letters Patent.

Patented Jan. 31, 19111,

- Application filed April 16, 1910. Serial No. 555,771.

To all whom it may concern:

Be it known that I, CHARLES E. GIERDING, l a citizen of the United States of America, and a resident of Belleville, in the State of New Jersey, haveinvented a new and useful Improvementin Safety-Brakes for Street- (lars, of which the. following is a specification.

This invention relates primarily to power multiplying hand brakes for street railway cars, of the type patented February 26,1895, by United States Letters Patent No. 534752 which type a safety chain, with its appurtenances, is super-added, as an emergency device, cally effective in the event of the parting of the working chain or the failure of any of its links or connections. The improved construction, however, may be embodied in part in other street-car brakes'in which a sprocket hub having a vertical interacts With a chain or chains in substantially like manner. In the use of such brakes, if the sprockets and chains are not cleaned occasionally grease and dirt accumulate on them and prevent the best work; sometimes causing those portions of the endless chains or one of them escaping from the sockcted sprocket hub to stick in the sockets and 4 carry around so as to block the entrance of the chain or chains on the other side of the hub.

The present invention consists in certain novel combinations of parts, and in an improved street-car brake embodying such combinations or any of them, as hereinafter particularly described and claimed.

The leading objects of this invention are to keep both chains from carrying around as above mentioned; to avoid any kinking or checking of either chain; and to keep the two chains separate at and in the vicinity of the sprocket hub.

Other objects will be set forth in the general description which follows. 7

, F our sheets of drawings, showing the present invention embodied as a whole in an inn proved safety brake for street cars, accompany this specification part thereof.

Figure 1 is a sectional side view of the improved brake; Fig. 2 represents a horizon tal section in the plane of the working chain; Fig. 3 is a fragmentary plan view showing the parts at the top of the car platthe housing of the improved I same scale as Figs. 4 to 8 inclusive. to become automatif parts in all the figures.

said alternate links of the chain;

spcctive chains 2' and 1 same scale as Fig. 7, showin the same parts except the pinion shaft; an Figs. 9 and 10 are respectively side and bottom views of brake, on the Like reference characters refer tolike In the improved safety brake represented by the drawings, suitably multiplied power is transmitted from the customary hand crank or brake handle, 1 staff, Z), by a subjacent pinion shaft, pinion, (Z, preferably of 14 teeth, and a spur a, and its vertical gear, 0, preferably of 44 teeth in mesh with pinion, to a sprocket hub, 7, which is preferably and conveniently integral with said gear, being carried beneath it, and rotatable therewith'aronnd a sprocket shaft, which is bolted fast within a housing, li,

a car, as represented beneath the platform of in l igs. l and A working chain, 2', and a subjacent safety chain, j, interact respectively with two circinnferential sprocket portions, l1 and 22, of the hub portions includes series of Each of these sprocket peripheral sockets,

loosely fitted to separated in circumferential series by sprocket projections, 1, which interact with the ends of the socket-inclosed links; and bisected by deep circumferential grooves, 3 and 4, which admit edgewise the other links of the re- 7', as in Fig. 7. Owing to this construction, five links of each chain are in direct contact with the sprocket pr0- jection l of the sprocket hub f at all times when the brake shoes are being applied. A concentric front portion, 5, of the housing It embraces a sufficient portion of the periphcry of the sprocket hub f to keep the chain links within its elfective sockets; and the opposite side or rear end of the housing is open and extended rearward as. regards that portion which incloses the sprocket hub preferably 8 in number,

face, side and top views of the horizonml x) amhub, v ocket pmtions embracim n side thmug ape, a char gu "T7116. DPQJJS censtrvcied ZQjQCi; between '51 e entering am 70119 of the respactive 21 ems i qr fastening said cl open side 01" the housin TE 6 combinati n, in a 133, and means ume wiflzin ii LOFEZKMA J1 mg is somes renre serving additionally to keep the two chains separate. and-means for fastening said chain guide within said open si dc o f the housing.

The combination, in a safety brake for street-cars. of a working chain, a suhjacent safety chain, a sprocket hub cou'nnon to both chains having a vertical axis and a circuit]- ferential-sprocket portion in two horizontal planes. means for rotating said huh, a housing partly embracing said hub and having an openside through which the chains enter and eseape', 'a' chain guide having two pairs 7 of rigid fingersconstructed and arranged to project between the entering andeseaping portions of the respective chains so that neither of them can carry around horizontal 'shelf portions emistructed and arranged 'to support from beneath the entering .and escaping portions of each ofsaid chains at and 1n the vlcnnty of said huh andvertica conneet|ng portions; said guide being provided with .a horizontal bolt hole extend lug endwise' through the upper shelf and a central 'vertical holtholc in the lowershelf: and bolts fitted to said bolt holes for fastening said chain guide within said open side of the housing.'

' (3. A safety brake for street-carshaving, in COIH'Jl nation, a hand-operatedstafi', a subjaeent pinion shaft coupled thereto, powermultiplying gearing consisting of a pinion on said pinion shaft and a large gear in mesh therewith, a sprocket hub carried subjacently bysaid gear and having a vertical in two horizontal planes, a working chain interacting with the upper of'said sprocket portions, a safety chain interacting .with the lower of said sprocketportions,a housin partly embracing said gearing and said hub and having an open side throi 'h which the chains enter and escape, a chain guide having two pairs of rigid fingers constructed and arranged to pro ect between the entering and escaping portions ofthe respective" chains so that neitherof them can carry around, and horizontal shelf portions constructed and arranged to support from beneath .theentering and escaping'portions of each of said chains at and .in the vicinity of said hub, and meansfor fastening said chain guide within said open side of the housing, substantially-as hercinbefore specified,

CHARLES-E; GIERDING.

Witnesses WALTER BRYERS, L, B, Rommon'r.

' axis and circumferential sprocket portions 

